如何检测浏览器的版本? [英] How can you detect the version of a browser?

问题描述

我一直在寻找可以让我检测访问该网站的用户使用的是 Firefox 3 还是 4 的代码.我找到的只是用于检测浏览器类型而不是版本的代码.

I've been searching around for code that would let me detect if the user visiting the website has Firefox 3 or 4. All I have found is code to detect the type of browser but not the version.

如何检测这样的浏览器版本?

How can I detect the version of a browser like this?

推荐答案

您可以看到浏览器说了什么，并使用该信息记录或测试多个浏览器.

You can see what the browser says, and use that information for logging or testing multiple browsers.

navigator.sayswho= (function(){
    var ua= navigator.userAgent;
    var tem; 
    var M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=/))/?s*(d+)/i) || [];
    if(/trident/i.test(M[1])){
        tem=  /rv[ :]+(d+)/g.exec(ua) || [];
        return 'IE '+(tem[1] || '');
    }
    if(M[1]=== 'Chrome'){
        tem= ua.match(/(OPR|Edge)/(d+)/);
        if(tem!= null) return tem.slice(1).join(' ').replace('OPR', 'Opera');
    }
    M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?'];
    if((tem= ua.match(/version/(d+)/i))!= null) M.splice(1, 1, tem[1]);
    return M.join(' ');
})();

console.log(navigator.sayswho); // outputs: `Chrome 62`

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